1. pentatonic scaleMusic
Wikipedia definition
2. Pentatonic scaleA pentatonic scale is a musical scale with five notes per octave in contrast to a heptatonic (seven note) scale such as the major scale and minor scale. Pentatonic scales are very common and are found all over the world. The ubiquity of pentatonic scales, specifically anhemitonic modes, can be attributed to the total lack of the most dissonant intervals between any pitches; there are neither any semitones (and therefore also no complementary major sevenths) nor any tritones.
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